Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 28, 2014	Sep. 30, 2015	Sep. 28, 2014
Taxes on Change in unrecognized benefit plan losses arising during the period	$ 1,303	$ (2)	$ (434)	$ (1,325)
Taxes on Adjustment for previously unrecognized benefit plan losses included in net income	2	(17)	7	(56)
Taxes on Change in unrealized holding gain arising during the period	(1,152)	3,077	(2,340)	3,077
Taxes on Change in foreign currency translation adjustments	$ (741)	$ (1,076)	$ (1,148)	$ (743)